Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1165
Number of amino acids:225
Molecular Weight:24185.09 Da
Theoretical pI:7.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)177.56%
Cysteine CYS (C)167.11%
Glutamic Acid GLU (E)20.89%
Aspartic Acid ASP (D)125.33%
Glycine GLY (G)2511.11%
Phynylalanine PHE (F)167.11%
Isoleucine ILE (I)83.56%
Histidine HIS (H)20.89%
Lysine LYS (K)41.78%
Methionine MET (M)20.89%
Leucine LEU (L)135.78%
Asparagine ASN (N)156.67%
Glutamine GLN (Q)94%
Proline PRO (P)135.78%
Serine SER (S)177.56%
Arginine ARG (R)125.33%
Threonine THR (T)229.78%
Tryptophan TRP (W)31.33%
Valine VAL (V)94%
Tyrosine TYR (Y)83.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1054
HydrogenH1590
NitrogenN296
OxygenO325
SulphurS18

FormulaC1054H1590N296O325S18
Total Number of Atoms:3283


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.216,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.175,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.33, 31.11, 15.11]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:55.5556
Grand average of hydropathicity (GRAVY):-0.18